# johnathan

Newest questions and responses by johnathan
1. ## social studies

what was the purpose of the freedmen's bureau?

2. ## Statistics

A common blood test performed on pregnant women to screen for chromosome abnormalities in the fetus measures the human chorionic gonadotropin (hCG) hormone. Suppose that in a given population, 6% of fetuses have a chromosome abnormality. The test correctly

3. ## Statistics

A common blood test performed on pregnant women to screen for chromosome abnormalities in the fetus measures the human chorionic gonadotropin (hCG) hormone. Suppose that in a given population, 6% of fetuses have a chromosome abnormality. The test correctly

4. ## Statistics

A genetic trait is inherited in such a way that for a father with the trait, his male offspring have a 25% chance of inheriting it but his female offspring cannot inherit it. Suppose that in a certain population, 40% of offspring are male and offspring

5. ## Physics

An airplane flies at airspeed (relative to the air) of 250 km/h . The pilot wishes to fly due North (relative to the ground) but there is a 65 km/h wind blowing Southwest (direction 225◦ ). In what direction should the pilot head the plane (measured

6. ## Statistics

3. A researcher wanted to study the effect of low light environments on the growth of alfalfa plants, so she grew six plants and measured their heights after two weeks. She calculated a sample mean of 5.2 cm with a standard deviation of 1.1 cm. If the

7. ## Chemistry

Describe in detail how you would make 1.25 of 0.125 M potassium permanganate solution. I think you have to set up an equation for molarity but I'm not sure. Please help.

8. ## Math

1. Two of the risers are shown at the right. Find the length of the longest side of these triangular risers. cong1 2. Rope lighting is to be placed around the outer edge of these risers. Find the number of feet of rope lighting needed for both risers. tri4

9. ## Math

1. As the geese are sitting in a row on their feeder, the first goose eats m kernels of cracked corn. Each goose in the row then eats 1 less than twice the number of kernels eaten by the previous goose. Which of the numbered choices expresses the total

10. ## Math

I am not sure which questions I got wrong but I am not getting the link correct to the next box. The website is mathbits(dot)com/caching/holiday/H30976.html I got these answers 1.) Choice 3 2.) Choice 2 3.) a.) Choice 2 b.) 63 4.) 8 To move on I need to

11. ## Math

4. The CGJ girls plan to string a set of lights diagonally from two vertical poles for overhead lighting for dancing on the right side of the deck (see the diagram). The string of lights is sold in foot increments only. How many feet of diagonal lighting

12. ## chemistry

Observe the diagram of the electrolytic cell (A aqueous solution of molten salt with a power supply). The molten salt is lithium flouride. Write the half reaction occuring at the cathode, following the usual style guide and making sure to balance

13. ## Math

If you eat 1/6 of one pizza 1/4 of another pizza 5/12 of another pizza and 1/3 of another pizza have you eaten the equivalent of a whole pizza

14. ## physics

A tennis ball has a mass of 58 g and a diameter of 8 cm. Find the moment of inertia about its diameter. Assume that the ball is a thin spherical shell.

15. ## physics

The system shown in the figure below consists of a mass M = 3.5-kg block resting on a frictionless horizontal ledge. This block is attached to a string that passes over a pulley, and the other end of the string is attached to a hanging m = 2.2-kg block.

16. ## physics

A 2.1-kg 12-cm-radius cylinder, initially at rest, is free to rotate about the axis of the cylinder. A rope of negligible mass is wrapped around it and pulled with a force of 18 N. (a) Find the magnitude of the torque exerted by the rope. N · m (b) Find

17. ## physics

A string that passes over a pulley has a 0.375 kg mass attached to one end and a 0.630 kg mass attached to the other end. The pulley, which is a disk of radius 9.50 cm, has friction in its axle. What is the magnitude of the frictional torque that must be

18. ## physics

A cat walks along a uniform plank that is 4.00 m long and has a mass of 7.00 kg. The plank is supported by two sawhorses, one 0.44 m from the left end of the board and the other 1.60 m from its right end. When the cat nears the right end, the plank just

19. ## physics

A swimmer heads directly across a river, swimming at 1.2 m/s relative to the water. She arrives at a point 48 m downstream from the point directly across the river, which is 77 m wide. (a) What is the speed of the river current? (b) What is the swimmer's

20. ## physics

Two people take identical jet skis across a river, traveling at the same speed relative to the water. Jet ski A heads directly across the river and is carried downstream by the current before reaching the opposite shore. Jet ski B travels in a direction

21. ## algebra 2

You have \$16 to spend at a movie theatre. You spend \$10 for admission. You want to buy soft drinks that cost \$2.50 each, how many can you buy? Show your equation & work. Help!

22. ## Physic II

A flat 1.0 m2 surface is vertical at x = 2.0 m and parallel to the yz-plane. What is the flux through the surface if it is located in a uniform electric field given by E = 25.0i + 42.0j + 62.0k N/C? Please show explanation

23. ## Physic II

A small glass bead that has been charged to 4.4 nC? What is the strength of the electric field 2.0 cm from the center of the bead? Please show all work

24. ## functions Steve and Reiny

I want to thank you both for your help and no sir I have never dealt with functions before as I am 44 years old and going back to school, I am taking an online class my textbooks are not scheduled to arrive until Nov 1, so I am a little lost but hey thank

25. ## functions

For each problem, construct two composite functions, . Evaluate each composite function for x=2 ok i have not dealt with composite functions can I please get some help with this as I have 20 questions to do can someone show me step by step on how to

26. ## math

1.)simplified 2x^4y/6xy^2 I got 1x4y? 2.)(8x^2)(-3x^y) 18x^4y right? I ddnt know what to do with the y

27. ## math

solve (-2y)^2(3x^3) I totally don't get this problem. Does my answer come out with x and y ? how do I eliminate?

28. ## Math

Alicia went on a steamboat ride up the Mississippi River. The boat travels 20 miles per hour in still water. How long will it take her to travel 60 miles upstream if the current of the river is 8 miles per hour?

29. ## math

susie writes the division fact 20/5=. write the remaining fact in this fact family.

Draw a model to show 84/12=7

31. ## physics

A circular coil (980 turns, radius = 0.078 m) is rotating in a uniform magnetic field. At t = 0 s, the normal to the coil is perpendicular to the magnetic field. At t = 0.027 s, the normal makes an angle of 45o with the field because the coil has made

32. ## physics

can anyone please help me on this one? A circular coil (980 turns, radius = 0.078 m) is rotating in a uniform magnetic field. At t = 0 s, the normal to the coil is perpendicular to the magnetic field. At t = 0.027 s, the normal makes an angle of 45 degrees

33. ## physics

The radius of curvature of a convex mirror is 1.60 x 102 cm. An object that is 11.0 cm high is placed 40.0 cm in front of this mirror. Determine (a) the location and (b) the height of the image.

34. ## College Physics

In 1986, the distance of closest approach of Halley’s comet to the Sun is 0.57AU. (1 AU is the mean Earth-Sun distance = 150 million kilometers.) The comet’s speed at closest approach is 54.97 km/s. (a) – By 1989, Halley’s comet had traveled to a

35. ## Math

Prove that: P(A n B^c) = P(A U B) - P(B) and P(A n B^c) = P(A) - P(A n B)

36. ## Calculus

find f'(x) if f(x)=x^2*e^x*(3x-1)^3

37. ## Calculus

find f'(x) if f(x)=x^2e^(x(3x-1)^3

38. ## Calculus

find all points at the curve x^2y^2+2xy=3 with the slope of the tsngent is -1

39. ## Calculus

find y'' if x^4+y^4=16

40. ## Calculus

Could really use a lot of help here what is the slope of the tangent line to cos(x-y)=xe^x at point (0,3pi/2)

41. ## geometry

you are standing 12ft from a cylindrical corn syrup tank the distance from you to a point of tangency on the tank 35ft what is the radius of the tank

42. ## ross

Find dy/dx for y=e^x/x^2

43. ## Math

The grocery store employs 35 cashiers and grocery baggers altogether. There are 5 cashiers for every 2 grocery baggers. How many of each are employed?

How do I solve this problem: At Carver Elementary, there are 355 students altogether. The School has 25 more female students than males. How many males and females does Carver have?

45. ## us history

What was the role of Social Darwinism in American imperialism? Are there implications of race underneath a belief in Social Darwinism?

46. ## Precalculus

Solve the triangle ABC under the given conditions. a = 19, b = 8.2, c = 12 A= B= C=

compkete the pattern 25____61____97

48. ## Gilgamesh

How Does Gilgamesh respond to the death of Enkidu? a) He flees the city of Uruk to seek immortality b) He builds up the city of Uruk with monuments and massive walls to honor Enkidu c) He blames the harlot lass for brining this pain and suffering on Enkidu

49. ## earth science

If an atom has 17 electrons and its mass number is 35, calculate the following: number of protons, atomic number, and number of neutrons.

50. ## math sci

how can 36 stand for 1 square yard

51. ## science/math

sandy made a drawing of a rec tangle to show the area of the library. what is the area ,in square yards of the library? what stands for (1) square yard

52. ## Chemistry

In a lab we did potentiometric titrations with a mixture of NaCl/KI and AgNO3. We plotted a titration curve and found the 2 endpoints which indicate where I is and where Cl is. We are looking to find the concentration of both of the halides present, and we

53. ## Chemistry

Determine the concentration of Mg2+ (in mmol/L) in the unknown solution (Note: details and additional information to solve the problem are provided in your lab manual): Mass of EDTA: 0.606 g Volume of EDTA used in titration (step 1): 10.48 mL Volume of

54. ## social studies

how did the citystate have an impact on mesopotamia?

55. ## Physics

Does using (Fcos(theta))d work for this problem or should cos be replaced with sin? A cheerleader lifts his 66.4 kg partner straight up off the ground a distance of 0.718 m before releasing her.If he does this 27 times, how much work has he done?

56. ## science

i need information about the hydrogen molicule

57. ## chemistry

sorry Ksp of PbCl2 is 1.6 x 10-5

58. ## chemistry

Taking note of the equilibrium 4HCl(g) + O2(g) ----> 2H2(g) + 2Cl2(g). What would be the the equilibrium law expression for the balanced chemical equation?

59. ## chemistry

What mass of NaCl should be found in 0.51 L of a saturated solution of sodium chloride if the Ksp of NaCl is assumed to be 1.5 x 10-5?

I got this problem today in school, and I don't know how to go about soving it. Can someone show me. Thanks. Here it is. The distance s(t) between an object and its starting point is given by the antiderivative of velocity function v(t). Find the distance

61. ## trig

Evaluate without using a calculator or tables sin(pi/3 - 3pi/4) The answer is - 1+ square root of 3 / 2 square root of 2 How do I get this answer?

62. ## trig

If 0 is less than or equal to 2theta less than or equal to pi and P(2theta)= (-7/25, 24/25), find P(theta)

63. ## trig

Use the half angle formula to find cos(pi/12)

64. ## chemistry

Where can I find the reaction that produces ethyl formate, which is Methanol and Methanoic acid?

65. ## chemistry

Can I get weblinks that show the esterification reaction which produces ethyl formate and the estirificaiton process which produces Ethyl Butyrate?

66. ## chemistry

Using molecular polarities, discuss the solubility of the carboxylic acids in water.

67. ## physics

A 0.21 kg ball on a string is whirled on a vertical circle at a constant speed. When the ball is at the three o'clock position, the tension is 18 N. (c) Is the tension in the string greater when the ball is at the twelve o'clock position or when it is at

68. ## physics

A 0.21 kg ball on a string is whirled on a vertical circle at a constant speed. When the ball is at the three o'clock position, the tension is 18 N. -------------------------------------------------------------------------------- (a) How does the magnitude

69. ## physics

radius = Infinitely large velocity 30 m/s Hoe would you compute the centripetal acceleration of with the radius being infintely large?

70. ## math

how do you find percents and degrees when there are 50 people and not 100

72. ## English

Help! I can't find any information on the origin of the idiom/expression: Put your foot in your mouth. Please help me! "put one`s foot in one`s mouth - get into trouble by saying something embarassing or rude My colleague put his foot in his mouth when he

73. ## last problem

State the domain restriction for y = 5/(x+16)

74. ## another one i need help with

If f(x) = 3x, g(x) = x^2 -1, then find f(g(3))(HINT:The answer to this question should be a number not another function.) g(3) = 9 - 1 = 8, and f(g(3)) = f(8) = 24

75. ## can somebody help me with this

College enrollments in the United States are projected to increase from 1995 to 2005 for public and private schools. The models below give the total projected college enrollments in thousands, where x=0 represents the first year 1995. Public College: f(x)

1. ## Finance

I think Jakob should try and escape from the airport

posted on September 25, 2018
2. ## history

I think it is B Ireland.

posted on August 9, 2018
3. ## social studies

thx

posted on February 13, 2018
4. ## Tech ed

posted on February 1, 2018
5. ## Science

Chromosomes

posted on January 11, 2018
6. ## SIG FIGS

22.0 has three 0.22 has two 22 has two 0.022 has two 0.00000000223 has three

posted on October 8, 2017
7. ## English

A building 64 ft high casts a 288-ft shadow. Sarah casts a 18-ft shadow. The triangle formed by the building and its shadow is similar to the triangle formed by Sarah and her shadow. How tall is Sarah? 3 ft 6 ft 4 ft 5 ft

posted on November 29, 2016
8. ## math

A building 64 ft high casts a 288-ft shadow. Sarah casts a 18-ft shadow. The triangle formed by the building and its shadow is similar to the triangle formed by Sarah and her shadow. How tall is Sarah? 3 ft 6 ft 4 ft 5 ft

posted on November 29, 2016
9. ## math

A building 64 ft high casts a 288-ft shadow. Sarah casts a 18-ft shadow. The triangle formed by the building and its shadow is similar to the triangle formed by Sarah and her shadow. How tall is Sarah? 3 ft 6 ft 4 ft 5 ft

posted on November 29, 2016
10. ## math

The actual length of a puma is 2.45 m. The scale of a drawing of the puma is 1 cm : 0.5 m. Find the length of the puma in the drawing, to the nearest tenth of a centimeter. 4.9 cm 2.45 cm 1.2 cm 12.3 cm Description

posted on November 29, 2016
11. ## math

The actual length of a puma is 2.45 m. The scale of a drawing of the puma is 1 cm : 0.5 m. Find the length of the puma in the drawing, to the nearest tenth of a centimeter.

posted on November 29, 2016

1 2 1 2 3

posted on March 3, 2016
13. ## science

copper

posted on December 15, 2015
14. ## Statistics

\$32,000 less.

posted on August 13, 2015
15. ## science

A canoe displaces 100 L of water. Water weighs 9.8 N/L. What is the buoyant force on the canoe?

posted on June 25, 2014
16. ## Algebra

11

posted on December 9, 2013
17. ## Pre-Calc

thank you

posted on September 28, 2011
18. ## Pre-Calc

In #2 it was which one is NOT a representation , that's why I thought (-5,-30) I can't have all of them just the one that is NOT a representation Thank you

posted on September 28, 2011
19. ## accounting

\$183,000

posted on July 3, 2011

Please tell me the question and I will answer as soon as possible!

posted on March 24, 2011
21. ## us history

Are there any specific examples of the belief in Social Darwinism in American imperialism? The only thing that comes to mind was the extermination/assimilation of natives, but that's more so European imperialism.

posted on February 1, 2011
22. ## earth science

FIND OUT YOURSELF LITTLE KID!!!!

posted on September 24, 2010
23. ## Chemistry

The indicator used was Eriochrome Black T, and for the double titration... I don't know. I know that NaOH was added to precipitate Mg(OH)2, and then it was titrated with EDTA. Then it was left to sit for 5 minutes to dissolve any precipitated Ca(OH)2, and

posted on March 15, 2010
24. ## Physics

How do you find the force to plug in

posted on November 15, 2008
25. ## chemistry

Taking note of the equilibrium 4HCl(g) + O2(g) ----> 2H2(g) + 2Cl2(g). What would be the the equilibrium law expression for the balanced chemical equation?

posted on May 26, 2008